α,α-Dimethyl-4-(3,4,8,9-tetrahydro-6-methoxy-3,3,8,8-tetramethylfuro[2,3-h]isoquinolin-1-yl)benzeneacetonitrile 以
3,4,8,9-Tetrahydro-6-methoxy-3,3,8,8-tetramethyl-1-phenyl-5-furo[2,3-h]isoquinolineacetic acid ethyl ester hydrochloride 为溶剂,
以43%的产率得到α,α-Dimethyl-4-(3,4,8,9-tetrahydro-6-methoxy-3,3,8,8-tetramethylfuro[2,3-h]isoquinolin-1-yl)benzeneacetic acid ethyl ester